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Bootstrap Offcanvas - extended examples and tutorials

How it works

The Bootstrap Offcanvas component serves as a sidebar element that can be activated through JavaScript, allowing it to slide in from the left, right, top, or bottom of the viewport. Triggers, like buttons or anchors, are linked to the elements you want to toggle, and data attributes facilitate their activation in JavaScript.

Offcanvas shares some JavaScript code with modals. Conceptually, they are quite similar, but they remain separate plugins.
Likewise, some source Sass variables for offcanvas styles and dimensions are derived from the modal variables.
When displayed, offcanvas features a default backdrop that can be clicked to hide it.
As with modals, only one offcanvas can be displayed at a time.

Attention! Due to CSS animation handling, margin or translate cannot be applied to an .offcanvas element. Instead, utilize the class as a separate wrapping element.

Examples Offcanvas components

Below is a default offcanvas example (via .show on .offcanvas). Offcanvas supports a header with a close button and an optional body class for initial padding. We recommend including offcanvas headers with dismiss actions whenever possible, or providing an explicit dismiss action.

<div class="offcanvas offcanvas-start show" tabindex="-1" id="offcanvas" aria-labelledby="offcanvasLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasLabel">Offcanvas</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    The content for the Bootstrap offcanvas goes here. You can place nearly any Bootstrap component or custom element here.
  </div>
</div>

Live demo

Utilize the buttons below to toggle the visibility of an offcanvas element using JavaScript, which adds or removes the .show class from an element with the .offcanvas class.

.offcanvas hides content.
.offcanvas.show shows content.

You can employ a link with the href attribute or a button featuring the data-coreui-target attribute. In both instances, including data-coreui-toggle="offcanvas" is necessary.

Link with href

Some text as a placeholder. In real life, you can have the elements you have chosen, like text, images, lists, etc.

<a class="btn btn-primary" data-coreui-toggle="offcanvas" href="#offcanvasExample" role="button" aria-controls="offcanvasExample">
  Link with href
</a>
<button class="btn btn-primary" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#offcanvasExample" aria-controls="offcanvasExample">
  Button with data-coreui-target
</button>

<div class="offcanvas offcanvas-start" tabindex="-1" id="offcanvasExample" aria-labelledby="offcanvasExampleLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasExampleLabel">Offcanvas</h5>
    <button type="button" class="btn-close text-reset" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <div>
      Some text as a placeholder. In real life, you can have the elements you have chosen, like text, images, lists, etc.
    </div>
    <div class="dropdown mt-3">
      <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-coreui-toggle="dropdown">
        Dropdown button
      </button>
      <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
      </ul>
    </div>
  </div>
</div>

Body scrolling

The <body> element’s scrolling is disabled when the Bootstrap offcanvas and its backdrop are visible. Utilize the data-coreui-scroll attribute to allow scrolling on the <body>.

<button class="btn btn-primary" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#offcanvasScrolling" aria-controls="offcanvasScrolling">Enable body scrolling</button>

<div class="offcanvas offcanvas-start" data-coreui-scroll="true" data-coreui-backdrop="false" tabindex="-1" id="offcanvasScrolling" aria-labelledby="offcanvasScrollingLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasScrollingLabel">Offcanvas with body scrolling</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>Scroll further down the page to see this option in action.
</p>
  </div>
</div>

Body scrolling and backdrop

You can also enable <body> scrolling with a visible backdrop.

Try scrolling the rest of the page to see this option in action.

<button class="btn btn-primary" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#offcanvasWithBothOptions" aria-controls="offcanvasWithBothOptions">Enable both scrolling & backdrop</button>

<div class="offcanvas offcanvas-start" data-coreui-scroll="true" tabindex="-1" id="offcanvasWithBothOptions" aria-labelledby="offcanvasWithBothOptionsLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasWithBothOptionsLabel">Backdrop with scrolling</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>Try scrolling the rest of the page to see this option in action.</p>
  </div>
</div>

Static backdrop

When the backdrop is set to static, the Bootstrap offcanvas will remain open when clicking outside of it.

I won’t close if you click outside of me.

<button class="btn btn-primary" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#staticBackdrop" aria-controls="staticBackdrop">
  Toggle static offcanvas
</button>

<div class="offcanvas offcanvas-start" data-coreui-backdrop="static" tabindex="-1" id="staticBackdrop" aria-labelledby="staticBackdropLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="staticBackdropLabel">Offcanvas</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <div>
      I won’t close if you click outside of me.
    </div>
  </div>
</div>

Dark offcanvas

Deprecated in v5.0.0 Added in v4.2.6

Change the appearance of offcanvas elements using utilities to better match various contexts, such as dark navbars. Here, we add .text-bg-dark to the .offcanvas and .btn-close-white to .btn-close for proper styling with a dark offcanvas. If there are dropdowns inside, consider also adding .dropdown-menu-dark to .dropdown-menu.

Attention! Dark variants for components are no longer supported as of v5.3.0 due to the introduction of color modes. Instead of manually adding the classes mentioned earlier, simply set data-coreui-theme="dark" on the root element, a parent wrapper, or the component itself.

Place offcanvas content here.

<div class="offcanvas offcanvas-start show text-bg-dark" tabindex="-1" id="offcanvasDark" aria-labelledby="offcanvasDarkLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasDarkLabel">Offcanvas</h5>
    <button type="button" class="btn-close btn-close-white" data-coreui-dismiss="offcanvasDark" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>Place offcanvas content here.</p>
  </div>
</div>

Responsive Added in v4.2.6

Responsive offcanvas classes hide content that is outside the viewport from a specified breakpoint and lower. Above that breakpoint, the content will behave normally. For example, .offcanvas-lg hides content in an offcanvas below the lg breakpoint, but displays the content above the lg breakpoint.

Resize your browser to show the responsive offcanvas toggle.

This is content within an .offcanvas-lg.

<button class="btn btn-primary d-lg-none" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#offcanvasResponsive" aria-controls="offcanvasResponsive">Toggle offcanvas</button>

<div class="alert alert-info d-none d-lg-block">Resize your browser to show the responsive offcanvas toggle.</div>

<div class="offcanvas-lg offcanvas-end" tabindex="-1" id="offcanvasResponsive" aria-labelledby="offcanvasResponsiveLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasResponsiveLabel">Responsive offcanvas</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" data-coreui-target="#offcanvasResponsive" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p class="mb-0">This is content within an <code>.offcanvas-lg</code>.</p>
  </div>
</div>

Responsive offcanvas classes are available for each breakpoint.

.offcanvas
.offcanvas-sm
.offcanvas-md
.offcanvas-lg
.offcanvas-xl
.offcanvas-xxl

Placement

Offcanvas components do not have a default position; therefore, you need to apply one of the modifier classes listed below.

.offcanvas-start places the offcanvas on the left side of the viewport (as shown above)
.offcanvas-end places the offcanvas on the right side of the viewport
.offcanvas-top places offcanvas at the top of the viewport
.offcanvas-bottom places offcanvas at the bottom of the viewport

Feel free to experiment with the top, right, and bottom examples below.

<button class="btn btn-primary" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#offcanvasTop" aria-controls="offcanvasTop">Toggle top offcanvas</button>

<div class="offcanvas offcanvas-top" tabindex="-1" id="offcanvasTop" aria-labelledby="offcanvasTopLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasTopLabel">Offcanvas top</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    ...
  </div>
</div>

<button class="btn btn-primary" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#offcanvasRight" aria-controls="offcanvasRight">Toggle right offcanvas</button>

<div class="offcanvas offcanvas-end" tabindex="-1" id="offcanvasRight" aria-labelledby="offcanvasRightLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasRightLabel">Offcanvas right</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    ...
  </div>
</div>

<button class="btn btn-primary" type="button" data-coreui-toggle="offcanvas" data-coreui-target="#offcanvasBottom" aria-controls="offcanvasBottom">Toggle bottom offcanvas</button>

<div class="offcanvas offcanvas-bottom" tabindex="-1" id="offcanvasBottom" aria-labelledby="offcanvasBottomLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasBottomLabel">Offcanvas bottom</h5>
    <button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body small">
    ...
  </div>
</div>

Accessibility

Since the offcanvas panel is conceptually a modal dialog, be sure to add aria-labelledby="..."—referencing the offcanvas title—to .offcanvas. Note that you don’t need to add role="dialog" since we already add it via JavaScript.

Usage

Heads up! In our documentation, all examples show standard CoreUI implementation. If you are using a Bootstrap-compatible version of CoreUI, remember to use the following changes:

In the constructor, please use bootstrap instead of coreui. For example, new bootstrap.Alert(...) instead of new coreui.Alert(...)
In events, please use bs instead of coreui, for example close.bs.alert instead of close.coreui.alert
In data attributes, please use bs instead of coreui. For example, data-bs-toggle="..." instead of data-coreui-toggle="..."

The offcanvas plugin leverages several classes and attributes to perform its functions:

.offcanvas hides the content
.offcanvas.show shows the content
.offcanvas-start hides the offcanvas on the left
.offcanvas-end hides the offcanvas on the right
.offcanvas-top hides the offcanvas at the top
.offcanvas-bottom hides the offcanvas at the bottom

Include a dismiss button using the data-coreui-dismiss="offcanvas" attribute to activate the JavaScript functionality. Ensure you use the <button> element for consistent behavior across all devices.

Via data attributes

Include data-coreui-toggle="offcanvas" along with a data-coreui-target or href in the element to automatically control a single offcanvas component. The data-coreui-target attribute allows you to specify a CSS selector for the associated offcanvas. Remember to apply the offcanvas class to the offcanvas element. To have it open by default, also add the show class.

Dismiss

Dismissal can be achieved with the data attribute on a button within the offcanvas as demonstrated below:

<button type="button" class="btn-close" data-coreui-dismiss="offcanvas" aria-label="Close"></button>

or on a button outside the offcanvas using the data-coreui-target as demonstrated below:

<button type="button" class="btn-close" data-coreui-dismiss="offcanvas" data-coreui-target="#my-offcanvas" aria-label="Close"></button>

Via JavaScript

Enable manually with:

const offcanvasElementList = document.querySelectorAll('.offcanvas')
const offcanvasList = [...offcanvasElementList].map(offcanvasEl => new coreui.Offcanvas(offcanvasEl))

Options

Options can be passed using data attributes or JavaScript. To do this, append an option name to data-coreui-, such as data-coreui-animation="{value}". Remember to convert the case of the option name from “camelCase” to “kebab-case” when using data attributes. For instance, you should write data-coreui-custom-class="beautifier" rather than data-coreui-customClass="beautifier".

Starting with CoreUI 4.2.0, all components support an experimental reserved data attribute named data-coreui-config, which can contain simple component configurations as a JSON string. If an element has attributes data-coreui-config='{"delay":50, "title":689}' and data-coreui-title="Custom Title", then the final value for title will be Custom Title, as the standard data attributes will take precedence over values specified in data-coreui-config. Moreover, existing data attributes can also hold JSON values like data-coreui-delay='{"show":50, "hide":250}'.

Name Type Default Description backdrop boolean or the string static true Applies a backdrop to the body while the Bootstrap offcanvas is open. Alternatively, specify static for a backdrop that doesn’t close the offcanvas component when clicked. keyboard boolean true Closes the offcanvas when the escape key is pressed. scroll boolean false Allows body scrolling while the offcanvas is open. Methods Asynchronous methods and transitions

All our API methods are asynchronous and initiate a transition. They return to the caller as soon as the transition begins but before it concludes. Furthermore, a method call on a transitioning component will be ignored.

Refer to our JavaScript documentation for further details.

Activates your content as an offcanvas element and accepts an optional options object.

You can create an offcanvas instance using the constructor; for example:

const cuiOffcanvas = new coreui.Offcanvas('#myOffcanvas')

Method Description getInstance Static method that allows you to obtain the offcanvas instance associated with a DOM element getOrCreateInstance Static method that enables you to retrieve the offcanvas instance linked to a DOM element, or create a new one if it hasn’t been initialized hide Hides an offcanvas element. Returns to the caller before the offcanvas element is actually hidden (i.e. before the hidden.coreui.offcanvas event occurs). show Displays an offcanvas element. Returns to the caller before the offcanvas element is actually shown (i.e. before the shown.coreui.offcanvas event occurs). toggle Switches an offcanvas element between shown and hidden. Returns to the caller before the offcanvas element is actually shown or hidden (i.e. before the shown.coreui.offcanvas or hidden.coreui.offcanvas event occurs). Events

CoreUI for Bootstrap’s offcanvas class exposes a few events for hooking into offcanvas functionality.

Event Type Description hide.coreui.offcanvas This event is fired immediately after the hide method has been called. hidden.coreui.offcanvas This event is fired when an offcanvas element is hidden from the user (it will wait for CSS transitions to complete). hidePrevented.coreui.offcanvas This event is triggered when the offcanvas is shown, its backdrop is static, and a click outside of the offcanvas occurs. The event is also triggered when the escape key is pressed and the keyboard option is set to false. show.coreui.offcanvas This event fires immediately when the show instance method is invoked. shown.coreui.offcanvas This event is fired when an offcanvas element becomes visible to the user (it will wait for CSS transitions to complete).

const myOffcanvas = document.getElementById('myOffcanvas')
myOffcanvas.addEventListener('hidden.coreui.offcanvas', event => {
  // do something...
})

Customization CSS variables

Offcanvas utilizes local CSS variables on .offcanvas for improved real-time customization. The values for the CSS variables are defined through Sass, ensuring that Sass customization remains supported as well.

--cui-offcanvas-zindex: #{$zindex-offcanvas};
--cui-offcanvas-width: #{$offcanvas-horizontal-width};
--cui-offcanvas-height: #{$offcanvas-vertical-height};
--cui-offcanvas-padding-x: #{$offcanvas-padding-x};
--cui-offcanvas-padding-y: #{$offcanvas-padding-y};
--cui-offcanvas-color: #{$offcanvas-color};
--cui-offcanvas-bg: #{$offcanvas-bg-color};
--cui-offcanvas-border-width: #{$offcanvas-border-width};
--cui-offcanvas-border-color: #{$offcanvas-border-color};
--cui-offcanvas-box-shadow: #{$offcanvas-box-shadow};
--cui-offcanvas-transition: #{transform $offcanvas-transition-duration ease-in-out};
--cui-offcanvas-title-line-height: #{$offcanvas-title-line-height};

SASS variables

$offcanvas-padding-y:               $modal-inner-padding;
$offcanvas-padding-x:               $modal-inner-padding;
$offcanvas-horizontal-width:        400px;
$offcanvas-vertical-height:         30vh;
$offcanvas-transition-duration:     .3s;
$offcanvas-border-color:            $modal-content-border-color;
$offcanvas-border-width:            $modal-content-border-width;
$offcanvas-title-line-height:       $modal-title-line-height;
$offcanvas-bg-color:                var(--#{$prefix}body-bg);
$offcanvas-color:                   var(--#{$prefix}body-color);
$offcanvas-box-shadow:              $modal-content-box-shadow-xs;
$offcanvas-backdrop-bg:             $modal-backdrop-bg;
$offcanvas-backdrop-opacity:        $modal-backdrop-opacity;

CoreUI vs Bootstrap

While this Offcanvas component is fully compatible with Bootstrap and follows its core principles, CoreUI delivers a more complete solution for modern app development.

What sets CoreUI apart from Bootstrap?

✅ Fully compatible with Bootstrap – Built directly on Bootstrap, all classes and behaviors work as expected.
🧠 Framework-native versions – CoreUI provides dedicated libraries for React.js, Vue.js, and Angular, unlike Bootstrap which relies on third-party plugins for JavaScript frameworks.
👨‍💻 Maintained by a full-time team – CoreUI is developed as a professional product, not a volunteer-driven project.
📦 More built-in components – Includes additional ready-to-use components like range sliders, multi-selects, steppers, etc.
🛠️ Sass Modules support today – CoreUI already supports Sass Modules, which are planned for Bootstrap 6.
🌍 Better LTR/RTL support – Uses modern CSS logical properties for seamless bidirectional layout support.
🔒 LTS (Long-Term Support) – Bootstrap now offers LTS only via paid third parties like HeroDevs, while CoreUI continues to offer long-term support natively and for free.

Whether you’re building internal tools, dashboards, or SaaS platforms — CoreUI combines the familiarity of Bootstrap with a more powerful, scalable, and production-ready ecosystem.

👉 Explore CoreUI Bootstrap Components
👉 Compare CoreUI vs Bootstrap

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